Vodka + fruit (soft berries tended to work best)
Shake and leave. I've made cherry vodka and the equivalent of cassis in the past using this method.

There was some fruit/booze concoction one of my ex's made Rumtopft or something similar. Loads of booze (mostly brandy, rum and vodka) and loads of fruit (berries, pear, apple) and loads of sugar.

It was intended to be a dessert sauce, but that was an arse idea as it got used very rarely and when we split up I took half of the rumtopf, bottled it with tequila and got smashed to bits on that. Was verrrrrrrr nice if a bit strong.